LED belts are now one of the most commonly used lamps. This article China black led neon flex strip mainly explains the main components of common light strips.
High voltage lamp strip
The composition of a high voltage lamp belt
The so-called high voltage lamp belt, is the input is 220V mains light belt. Of course, it can not be directly connected with 220V AC, but also needs to connect with a power source.
The power source inside the structure is extremely simple, is a rectifier bridge pile, the AC mains rectifier into non-standard direct current. Leds are semiconductors that use direct current.
One, flexible lamp bead board
The most crucial part is that the flexible circuit board is affixed with the appropriate amount of LED patch lamp beads and current limiting resistance.
We understand that the voltage of a single LED lamp bead is between 3-5V; so the more than 60 beads string up, the voltage can be about 200V, it is close to the mains voltage of 220V, coupled with the resistance current limiting, you can let the LED lamp bead board in the rectified after the AC, can work properly.
More than 60 (of course, there are 120, 240, but only in parallel) beads strung together, the length of almost a meter. Therefore, the high voltage lamp belt is typically a meter cut.
The quality requirement of FPCB is to ensure the current load of single string lamp belt within one meter. Because the single series of current is commonly milliamperage level, the copper thickness requirements for the elevated-voltage flexible version do not need to be extremely steep, and the use of single-layer panel will be additional.
Two, wire
Connecting each meter of light is a wire. When the high voltage DC is on the wire, the voltage drop is extremely slight compared to the low voltage band of 12V or 24V. This is why high voltage light strips can be rolled up to 50 meters, or even 100 meters. The wire embedded on both sides of the elevated voltage lamp belt transmits high voltage electricity to each series of flexible lamp bead board.
The quality of the wire is extremely crucial for the whole high voltage lamp belt. Typically high-quality high-voltage lamp belt wire is made of copper wire, the cross-sectional area will be relatively thick, relative to the total power of high-voltage lamp belt, is more than abundant.
But the inexpensive and low quality high voltage lamp belt will not use copper wire, but copper-clad aluminum wire, or directly aluminum wire, or even iron wire. The brightness and power of this kind of lamp belt is naturally not extremely strong, and the possibility of wire burnout due to overload is also fairly large. People are advised to avoid buying this lamp belt.
Three, potting glue
A high voltage lamp with wire running is elevated voltage piezoelectric, it will be dangerous, insulation must be done. The general practice is to pot-seal transparent PVC material plastic.
This kind of plastic is light transmittance, light weight, excellent plasticity, insulation, insulation performance is also excellent. With this layer of protection, the elevated pressure light belt can be used safely, even outdoors, even in rain or wind.
Knock on the blackboard! Here is cold knowledge: because of the performance of transparent PVC plastic, after all, it is not air, for the attenuation of lamp brightness is certain. This is not difficult, the difficulty is that the relevant color temperature of the lamp band is also affected, that is, the headache of color temperature drift. Broadly speaking, it floats up to 200-300K. For example, if you make a lamp bead board with a color temperature of 2700K, the color temperature may reach 3000K after sealing. You make it at 6500K, and when you poach it, it goes up to 6800K or 7000K.
Four, the original constant current chip high voltage lamp belt
With the rapid development of LED driver and integrated circuit, elevated voltage LED lamp belt has now used elevated voltage constant current IC.
What is IC? It stands for integrated circuit. Broadly speaking, they are tiny rectangular black blocks with 4-8 pins (there are also 16,32 pins, so the more versatile the feet, the more powerful. How about you count the number of feet of your computer’s CPU? .
With the help of these ICs, the elevated voltage lamp belt becomes considerably more stable. Even if the mains are unstable, such as elevated peak voltage, grid pollution and so on, it can ensure the normal operation of the LED lamp belt. Moreover, the appearance of elevated voltage LED lamp beads (the pressure drop at both ends is greater than 3-5V patch lamp beads, in fact, is nothing more than a number of lamp bead chips in series on a lamp bead package), also can make the elevated voltage lamp belt not limited to a meter cut. There is also a 10cm cut-out elevated voltage lamp belt available now.